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       ±è¿ø°ï ¹Ú»ç        2014.05.30 16:01        14804
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Çѱ¹»ý¸í°øÇп¬¿ø ±è¿ø°ï Ã¥ÀÓ¿¬±¸¿ø

 

1. °³¿ä

ÀÚ¿¬°è ÁÖ·Î ¹Ì»ý¹°·ÎºÎÅÍ ºÐ¸®µÈ Ç×»ý¹°ÁúÀº ÁÖ·Î ¸ðµâÈ­µÈ »ýÈ­ÇÐÀû °æ·Î¿¡ ÀÇÇØ »ý¼ºµÈ´Ù. Áï, ´ëºÎºÐÀÇ ¹Ì»ý¹°¿¡ÀÇÇØ »ý»êµÇ´Â ÀúºÐÀÚ Ç×»ý¹°ÁúÀº ´Ü¼øÇÑ building blockÀÌ 2Â÷ ´ë»ç°æ·Î¸¦ ÅëÇÏ¿© assembly µÇ¾î º¹ÀâÇÑ ±¸Á¶·Î ¸¸µé¾î Áø´Ù. ÀÌ·¯ÇÑ 2Â÷ ´ë»ç°æ·Î´Â ±Ùº»ÀûÀ¸·Î ¸ðµâÈ­µÈ Ư¼ºÀ» °¡Áö°í ÀÖ¾î ÇÕ¼º»ý¹°ÇÐÀ» À§ÇÑ ÈǸ¢ÇÑ platformÀÌ µÈ´Ù.1                         

¸ðµâÀ» µðÀÚÀÎÇÏ¿© »ý¹°ÇÐÀû ¹°ÁúÀ» °³·®ÇÏ´Â ÇÕ¼º»ý¹°ÇÐÀû ¹æ¹ýÀº ¹æ¼±±ÕÀÇ 2Â÷ ´ë»ç »ýÇÕ¼º°æ·Î¸¦ °³·®Çϴµ¥ Àû¿ëÇÒ ¼ö ÀÖ´Ù. ¹æ¼±±Õµî Ç×»ý¹°Áú »ý»ê¹Ì»ý¹°Àº °øÀåÀÇ ÄÁº£ÀÌ¾î º§Æ®¿¡¼­ Á¦Ç°ÀÌ »ý»êÇϵíÀÌ 2Â÷ ´ë»ç»ê¹°À» »ý»êÇÏ´Â È­ÇаøÀåÀ¸·Î »ý°¢ÇÒ ¼ö ÀÖÀ¸¸ç, ¹Ì»ý¹°ÀÇ ÀÌ·¯ÇÑ ±â´ÉÀº ±âº» building blockµé¿¡¼­ º¹ÀâÇÑ ±¸Á¶ÀÇ È­ÇÕ¹°ÀÌ ¸¸µé¾î Áöµµ·Ï ¸¹Àº È¿¼ÒµéÀÌ À¯±âÀûÀ¸·Î ÁýÀûµÈ È¿¼Ò º¹ÇÕü¿¡ÀÇÇؼ­ ¼öÇàµÈ´Ù.2
Macrolide ¿Í tetracycline °°Àº polyketide °è 2Â÷ ´ë»ç¹°ÁúÀº polyketide synthase (PKS)¿Í ¶ó´Â È¿¼Ò º¹ÇÕü¿¡ ÀÇÇؼ­ ÇÕ¼ºµÈ´Ù. Áï, acyl-coAÀ̶ó´Â building blockÀÌ ¼ø¼­ÀûÀ¸·Î ¶Ç´Â ¹Ýº¹ÀûÀ¸·Î ÃàÇÕ¹ÝÀÀÀ» ÅëÇÏ¿© assembly µÇ¾î polyketide backboneÀÌ ¸¸µé¾î Áø´Ù.2 ÀÌÈÄ specificÇÑ tailoring È¿¼Ò¿¡ ÀÇÇؼ­ sugar, alcohol, aromatic rings, methyl group, amine groupÀÇ functional group ÀÌ ºÎ°¡ÀûÀ¸·Î °áÇÕÇÑ´Ù. ÀÌ·¯ÇÑ functional groupÀÌ polyketide ¹°ÁúÀÇ »ý¹°È°¼º¿¡ ÁÖ·Î °ü¿©ÇÑ´Ù.3 µû¶ó¼­, ÇÕ¼º»ý¹°ÇÐÀûÀ¸·Î PKS ¿Í tailoring È¿¼ÒÀÇ ¸ðµâÈ­µÈ Ư¼ºÀ» ÇÕ¼º»ý¹°ÇÐÀûÀ¸·Î ÀÌ¿ëÇϸé chemical diversity¸¦ Áõ°¡½Ãų ¼ö ÀÖ´Ù.
b-lactam, glycopeptide, lipopeptide ¿Í °°Àº nonribosomal peptide (NRPs)Àº nonribosomal peptide synthase (NRPS)¶ó´Â È¿¼Ò¿¡ ÀÇÇØ natural ¾Æ¹Ì³ë»ê °ú unnatural ¾Æ¹Ì³ë»êÀ» building blockÀ¸·ÎÇÏ¿© »ý»êµÈ´Ù.4 NRPS È¿¼Ò´Â type I PKS¿Í ºñ½ÁÇÑ ±âÀüÀ¸·Î growing peptide chain¿¡ ¾Æ¹Ì³ë»êÀ» ¼ø¼­ÀûÀ¸·Î additionµÇ¸ç, tailoring È¿¼Ò¿¡ÀÇÇØ sugar, halogen, acyl groupÀÇ functional group ÀÌ ºÎ°¡ÀûÀ¸·Î °áÇÕÇϱ⠶§¹®¿¡, PKSó·³ ÇÕ¼º»ý¹°ÇÐÀû ¹æ¹ýÀ» Àû¿ëÇϸé chemical diversity¸¦ Áõ°¡½Ãų ¼ö ÀÖ´Ù. ±×·¯³ª, NRPS systemÀº building blockÀ¸·Î natural ¾Æ¹Ì³ë»ê °ú unnatural ¾Æ¹Ì³ë»êÀ» »ç¿ëÇÏ°í PKS systemÀº ¼Ò¼öÀÇ acyl CoA¸¦ building blockÀ¸·Î »ç¿ëÇϱ⠶§¹®¿¡ NRPS systemÀÌ ÈÙ¾À ´Ù¾çÇÑ È­ÇÐÀû ´Ù¾ç¼ºÀ» ÁÙ ¼ö ÀÖ´Ù. 
 

Fig. 1. Ç×»ýÁ¦°³¹ß¿¡¼­ ÇÕ¼º»ý¹°ÇÐ Àû¿ë ¸ðµ¨


ÇÕ¼º»ý¹°ÇÐÀû ¿ë¾îÀÎ part, device, chassis ¸¦ ÀÌ¿ëÇÏ¿© ÀÌ»óÀÇ °³³äÀ» Á¤¸®Çϸé,5 polyketide ¿Í peptide °°Àº scaffold¸¦ ÇÕ¼ºÇÏ´Â À¯ÀüÀÚ ¿Í tailoring È¿¼Ò´Â partÀÌ°í, Ư¼º È­ÇÕ¹°À» ¸¸µé ¼ö ÀÖ´Â ¿©·¯ À¯ÀüÀÚ(part)°¡ assemblyµÈ °ÍÀÌ device À̸ç, À̵é À¯ÀüÀÚ±º (device)ÀÌ ¹ßÇöÇÏ°í È­ÇÕ¹°À» »ý»êÇÏ´Â Àû´çÇÑ host (bacteria , yeast)°¡ chassisÀÌ´Ù (Fig. 1).

 

2. ÇÕ¼º»ý¹°ÇÐÀû Ç×»ýÁ¦ °³¹ß


Ç×»ýÁ¦ »ýÇÕ¼º À¯ÀüÀÚ´Â genome ¿¡¼­ ÀϹÝÀûÀ¸·Î clusterµÇ¾î ÀÖ´Â °Å´ë À¯ÀüÀÚÀÌ´Ù. Genomics, bioinformatics, analytical chemistry ±â¼úÀÇ ¹ßÀüÀ¸·Î Ç×»ýÁ¦¿Í °°Àº õ¿¬¹° ¿¬±¸¿¡ »õ·Î¿î Àü±â°¡ ¸¶·ÃµÇ°í ÀÖ´Ù.6 Áï, Àúºñ¿ë DNA sequencing ±â¼úÀÇ ¹ßÀü, »ýÇÕ¼º À¯ÀüÀڷκÎÅÍ È­Çб¸Á¶ ¿¹Ãø±â¼úÀÇ ¹ß´Þ, »ýÇÕ¼º È¿¼Ò ¿Í ¹ßÇö Á¶Àý¿¡ °üÇÑ Áö½ÄÀÇ Áõ´ë·Î ÇÕ¼º»ý¹°ÇÐÀû ±â¼ú Àû¿ëÀÌ °¡´ÉÇÏ°Ô µÇ¾ú´Ù. ÀÌ¿¡µû¶ó ÃÖ±Ù 10¿©³â µ¿¾È õ¿¬¹°ÀÇ »ýÇÕ¼º °æ·Î°¡ ¸¹ÀÌ ±Ô¸íµÇ¾úÀ¸¸ç, ƯÈ÷ metagenome À̳ª crytic biosynthetic pathway ¿¬±¸µµ È°¹ßÈ÷ ÁøÇàµÇ°í ÀÖ´Ù.

ÇÕ¼º»ý¹°Çп¡ÀÇÇÑ ´ëÇ¥ÀûÀÎ Ç×»ýÁ¦ °³¹ßÀº daptomycin ¿¬±¸ÀÌ´Ù. DaptomycinÀº ¹Ì±¹ÀÇ Cubist»ç¿¡ÀÇÇØ °³¹ßµÈ NRPS °è lipopeptide Ç×»ýÁ¦·Î¼­ Gram-positive bacteria¿¡ bactericidal Ç×±ÕÈ°¼ºÀ» º¸ÀÌ°í complicated skin infection °ú ³»¼º±Õ °¨¿°¿¡ »ç¿ëµÇ°í ÀÖ´Ù.7 DaptomycinÀº in vitro¿¡¼­ Streptococcus pneumoniae¿¡ MIC 0.06 ug/mLÀÇ °­·ÂÇÑ Ç×±ÕÈ°¼ºÀ» º¸ÀÌÁö¸¸, pulmonary surfactant¿Í °áÇÕÇÏ¿© daptomycinÈ°¼ºÀÌ ÀúÇصǾî pneumoniae infection ¿¡ »ç¿ëÇÒ ¼ö ¾ø´Ù. BaltzµîÀº °¢±â ´Ù¸¥ ¾Æ¹Ì³ë»êÀÇ specific ¸ðµâÀ» ġȯÇÔÀ¸·Î½á ´Ù¾çÇÑ hybrid NRPS È­ÇÕ¹°Àº ¸¸µé¾ú´Ù. Tridecapeptide backbone¿¡¼­ 6°³ÀÇ ¾Æ¹Ì³ë»ê±îÁö ġȯÇÏ¿© 16°³ÀÇ hybrid NRPS¸¦ ¸¸µé¾úÀ¸¸ç,8 ÀÌÁß ÇÑ À¯µµÃ¼°¡ 1% surfactant ¿¡¼­µµ daptomycin º¸´Ù 32¹è ³·Àº MIC¸¦ º¸¿´À¸¸ç, S. pneumoniae lung infection mouse model ¿¡¼­µµ Ä¡·áÈ¿°ú¸¦ º¸ÀÌ´Â °ÍÀÌ ¹ß°ßµÇ¾ú´Ù.

Fig. 2. Tailoring È¿¼Ò¿¡ÀÇÇÑ glycopeptideÀÇ ´Ù¾çÇÑ modification ¹æ¹ý

 

Glycopeptide´Â È­ÇÐÀû ´Ù¾ç¼ºÀ» Áõ°¡½ÃÅ°±â À§ÇÏ¿© ÇÕ¼º»ý¹°ÇÐÀ» Àû¿ëÇÒ ¼ö ÀÖ´Â ÁÁÀº Á¶°ÇÀ» °®Ãß°í ÀÖ´Ù. Vancomycin, teicoplanin °ú °°Àº glycopeptide´Â peptidoglycan ÀÇ acyl-D-ala-D-ala ¸»´Ü¿¡ °áÇÕÇÏ¿© ±×¶÷ ¾ç¼º ¼¼±ÕÀÇ »ýÀ°À» ÀúÇØÇÏ´Â Ç×»ýÁ¦·Î Staphylococcus aureus ¿Í Entercoccus¿¡ ´ëÇÏ¿© ÀÓ»óÀûÀ¸·Î Áß¿äÇÑ Ç×»ýÁ¦ÀÌ´Ù. ÀÌ Ç×»ýÁ¦´Â heptapeptide scaffold¿¡ glycosyltransferase, halogenase, acylase, methytransferase, sulfotransferase µîÀÇ tailoring È¿¼Ò¿¡ ÀÇÇØ modification µÇ¸é¼­ »ý»êµÈ´Ù.9 Chlorination ¿¡ÀÇÇÑ halogenationÀº peptideÀÇ assembly ´Ü°è¿¡¼­ È­ÇÕ¹°ÀÇ stability¸¦ À¯Áö½ÃÅ°¸ç, Ç×±ÕÈ°¼º¿¡ ÇÊ¿äÇÑ ±¸Á¶ÀÎ intermolecular dimerization Çü¼º¿¡ ÁÖ¿äÇÑ ¿ªÇÒÀ» ÇÑ´Ù. ÁÖ·Î 2¹ø ¶Ç´Â 6¹ø ¾Æ¹Ì³ë»êÀÎ tyrosine ¶Ç´Â -hydroxytyrosine ¿¡ chlorine¿¡ °áÇյǴµ¥, ´Ù¸¥ ¾Æ¹Ì³ë»ê¿¡ chlorineÀÌ ºÙÀ̸é È­ÇÐÀû ´Ù¾ç¼ºÀ» Áõ°¡½Ãų ¼ö ÀÖ´Ù. GlycosylationÀº °¡Àå ¸¹ÀÌ ¿¬±¸µÈ tailoring ±âÀüÀ¸·Î¼­ glycopeptideÀÇ solubility, ±¸Á¶Àû rigidity, Ç×±ÕÈ°¼º¿¡ ¿µÇâÀ» ¹ÌÄ£´Ù. 4, 6, 7¹øÀÇ ¾Æ¹Ì³ë»ê ƯÈ÷ 4¹ø hydroxyphenylglycineÀÇ OH±×·ì¿¡¼­ glycosylation ÀÌ Àß ÀϾ °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. ChloroeremomycinÀÇ glycosylatransferase (GtfB)ÀÇ °áÁ¤±¸Á¶°¡ ¹àÇôÁ®¼­ ´ç°ú aglyconÀÇ °áÇÕÀ§Ä¡¸¦ modelingÀ» ÅëÇÏ¿© ¾òÀ» ¼ö ÀÖ´Ù. ¶ÇÇÑ vancomycin glycosyltransferase (GtfE)´Â sugar substrate¿¡ ´ëÇÑ ±âÁú ƯÀ̼ºÀÌ Å©Áö ¾Ê¾Æ aminosugar µî 30°³ÀÌ»óÀÇ natural ¶Ç´Â synthetic sugar¸¦ ÀÌ¿ëÇÑ´Ù. ¶ÇÇÑ GtfE´Â À¯»çÇÑ ´Ù¸¥ aglyconeÀ» glucosylation ½ÃÅ°±âµµ ÇÑ´Ù. Áï, Amycolatopsis orientalis¿¡¼­ ºÐ¸®µÈ GtfE À¯ÀüÀÚ¸¦ A47934 (teicoplanin-related heptapeptide) »ý»ê±ÕÁÖ Streptomyces toyocaensis¿¡ ¹ßÇöÇÏ¿© glucosyl A47934 ¶ó´Â hybrid glycopeptide »ý»êÀÌ º¸°íµÇ¾ú´Ù.10 ÀÌ¿Í °°ÀÌ, glycosyltransferase¿¡ ´ëÇÑ ¸¹Àº Áö½ÄÀÌ ±¸ÃàµÇ¾ú°í, glycosylation siteÀÇ ´Ù¾ç¼º°ú aminosugarµî suagr ±âÁúÀÇ ´Ù¾ç¼ºÀÌ È®º¸µÇ¾î Àֱ⠶§¹®¿¡, glycosylationÀº ÇÕ¼º»ý¹°ÇÐÀû ±â¼ú Àû¿ë °¡´É¼ºÀÌ ³ôÀº ºÐ¾ßÀÌ´Ù.
 

Fig. 3. ÇÕ¼º»ý¹°Çп¡ÀÇÇÑ glycopeptide ±¸Á¶ ´Ù¾ç¼º È®´ë


3.¸ÎÀ½¸»


ÇÕ¼º»ý¹°ÇÐÀº ¸¹Àº õ¿¬¹°ÀÇ È­ÇÐÀû ´Ù¾ç¼ºÀ» Áõ°¡½Ãų ¼ö ÀÖ´Â ÁÁÀº Àü·«À¸·Î Àνĵǰí ÀÖ´Ù. ƯÈ÷, glycopeptide´Â assembly lineÀÌ Àß ¹àÇôÁ® ÀÖ°í, ¸¹Àº tailoring È¿¼ÒµîÀÌ °ËÁõµÇ¾î Àֱ⠶§¹®¿¡ ÇÕ¼º»ý¹°ÇÐÀû Á¢±ÙÀ» Çϱâ ÁÁÀº scaffoldÀÌ´Ù. Amino acid¸¦ ġȯÇϰųª, glycosylationÀ» ÇÏ¿© unnaturalÇÑ hybrid glycopeptideÀ» ¼º°øÀûÀ¸·Î ¸¸µç »ç·Ê°¡ ÀÖ´Ù. ±×·¯³ª, ÇÕ¼º»ý¹°ÇÐ ±â¼úÀ» routineÇÏ°Ô Àû¿ëÇϱ⿡´Â ¿©·¯ °¡Áö ÇØ°áÇؾßÇÒ µµÀüÀûÀÎ °úÁ¦°¡ ÀÖ´Ù. ±¸ÃàÇÑ »ýÇÕ¼º À¯ÀüÀÚ±ºÀÇ ÀÌÁ¾¹ßÇöÀÇ ¾î·Á¿ò, ÁÖ¿ä precursorÀÇ °æÀïÀû ´ë»ç°æ·Î ÇØ°á, tailoring È¿¼ÒÀÇ ±âÁú ƯÀ̼º ¹× È¿À², »õ·Î¿î hybrid È­ÇÕ¹°ÀÇ efflux ¹®Á¦, potential toxic È­ÇÕ¹°ÀÇ ¼¼Æ÷³» ³»¼º ÇØ°áµîÀÌ´Ù. ±×·³¿¡µµ ºÒ±¸ÇÏ°í total synthesis¸¦ ÇÒ ¼ö ¾ø´Â º¹ÀâÇÑ Ãµ¿¬¹°¿¡ ´ëÇÏ¿© ÇÕ¼º»ý¹°ÇÐÀº »õ·Î¿î chemistry¸¦ Á¦°øÇÒ ¼ö ÀÖ´Â ¸Å·ÂÀûÀÎ Àü·«ÀÌ´Ù. ´õ¿íÀÌ, ÃÖ±Ù¿¡ »õ·Î¿î ÀǾ๰Áú¿¡ ´ëÇÑ ¿ä±¸°¡ ³ô°í, ±âÁ¸¹°Áú¿¡ ´ëÇÑ »õ·Î¿î È°¼ºÀ» ã´Â ¿¬±¸°¡ Ä¿Áü¿¡ µû¶ó ÇÕ¼º»ý¹°ÇÐÀº õ¿¬¹° ¿¬±¸¿¡ »õ·Î¿î ½Ã´ë¸¦ ¿­ °ÍÀ¸·Î ±â´ëµÈ´Ù.


Âü°í¹®Çå


1 Khosla, C., Kapur, S. & Cane, D. E. Revisiting the modularity of modular polyketide synthases. Curr. Opin. Chem. Biol. 13, 135-143, doi:10.1016/j.cbpa.2008.12.018 (2009).
2 Lai, J. R., Koglin, A. & Walsh, C. T. Carrier protein structure and recognition in polyketide and nonribosomal peptide biosynthesis. Biochemistry 45, 14869-14879, doi:10.1021/bi061979p (2006).
3 Weymouth-Wilson, A. C. The role of carbohydrates in biologically active natural products. Nat. Prod. Rep. 14, 99-110 (1997).
4 Fischbach, M. A. & Walsh, C. T. Assembly-line enzymology for polyketide and nonribosomal Peptide antibiotics: logic, machinery, and mechanisms. Chem. Rev. 106, 3468-3496, doi:10.1021/cr0503097 (2006).
5 Koide, T., Pang, W. L. & Baliga, N. S. The role of predictive modelling in rationally re-engineering biological systems. Nat. Rev. Microbiol. 7, 297-305, doi:10.1038/nrmicro2107 (2009).
6 Lautru, S., Deeth, R. J., Bailey, L. M. & Challis, G. L. Discovery of a new peptide natural product by Streptomyces coelicolor genome mining. Nat. Chem. Biol. 1, 265-269, doi:10.1038/nchembio731 (2005).
7 Arbeit, R. D. et al. The safety and efficacy of daptomycin for the treatment of complicated skin and skin-structure infections. Clin. Infect. Dis. 38, 1673-1681, doi:10.1086/420818 (2004).
8 Nguyen, K. T. et al. Genetically engineered lipopeptide antibiotics related to A54145 and daptomycin with improved properties. Antimicrob. Agents Chemother. 54, 1404-1413, doi:10.1128/AAC.01307-09 (2010).
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